Smell of burning wires and smoke in interior on 1990 BMW 535i

I had smoke inside while driving and a very bad smell of burning wires. After shutting down for a few hours and running it again, there is no more smoke but still some continuing smell of wire burning. The heater fan no longer works.

Any ideas on where to start looking?

Asked by for the 1990 BMW 535i
Could be the blower motor, blower resistor or wiring harness.
It's dangerous to drive your car in this condition because of fire hazard. I'd suggest to tow your car to a repair shop, preferably a BMW specialty shop.

1 more answer
you will need to change the trans seal if the seal is bad that cause the trans fluid to leak on the mafler .